Tucking apparatus for curtain or like cloth

ABSTRACT

An apparatus for making a tucking curtain comprises a sewing machine with a presser foot, a slider slidably mounted on the base of the sewing machine and carrying a presser, a pair of upper and lower spatulas and a width setting bar located near under the arm head of the sewing machine. The curtain cloth is laid over the spatulas and the width setting bar, folded back around the bar and passed under the spatulas to form a loop and then sewed along its seam for the first run while held by the pressers. Then the upper spatula is raised apart from the lower to spread the looped cloth therebetween and simultaneously the tucking plate enters between the spaced spatulas to tuck in the looped cloth, whereupon the upper spatula is lowered and retracted together with the lower spatula and the width setting bar. The tucked-in edge is then sewed for the second run to complete the formation of a tuck in the cloth.

11] 3,918,376 [451 Nov. 1 1 1975 4] TUCKINC APPARATUS on CURTAIN OR LIKECLOTH Primat'y E.mnzi:zerGeorge H. Krizmanich Inventor's:Fukujiro'Nishiwaki, Maebashi- Tomii Yoshino, Higashikurume, both ofJapan Attornev, Agent, or Firm- Posnack, Roberts & Cohen [57] ABSTRACTAn apparatus for making a tucking curtain comprises a sewing machinewith a presser foot, a slider slidably mounted on the base of the sewingmachine and carrying a presser, a pair of upper and lower spatulas and awidth setting bar located near under the arm head of the sewing machine.The curtain cloth is laid over the spatulas and the width setting bar,folded back around the bar and passed under the spatulas to form a loopand then sewed along its seam for the first run while held by thepressersi'Then the upper spatula is raised apart from the lower tospread the looped cloth therebetween and simultaneously the tuckingplate enters between the spaced spatulas to tuck in the looped cloth.whereupon theupper spatula is lowered and retracted together with thelower spatula and the width setting bar. The tucked-in edge is thensewed for the m w aw m 5 1/ l a 9 /57 J H n m Ame 4 m m m 5 a ll S D m tT. l ym m2 N L .H m llM E 0 W 5 2 mm 0 H 18 4 LP C. P m L% G & 4 u 2 u SW 0 H D "2 N w 0 l h 2 u W C m ,6 m a l m mA 0 1l .I. l T. a .I..,J u sm & w mTm d C M 4 A3 mmr n% m "w T m m e l .f. vn m w U d L F d 8 e D. call 5 ".H/D. n m.m z an 0 nfl m 7 Z 2 3 555 5 second run to complete theformation of a tuck in the cloth.

1 12/144 6 Claims, 21 Drawing Figures mmn a mm 5 .mnfl n w o ma Doc Ala6 90% 0099 lll 2 86 Patent Nov. 11,1975 Sheet10f12 3,918,376

U.S.Paitent Nov. 11, 1975 Sheet2of 12 3,918,376

U.S.Patent N0v.11, 1975 Sheet30f12 3,918,376

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US. Patent Nov.11, 1975 Sheet5of12 3,918,376

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US. Patent Nov. 11, 1975 Sheet 7 of 12 3,918,376

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Sheet 10 of 12 3,918,376

U.S. Patent Nov. 11, 1975 US. Patent Nov. 11,1975 Sheet 12 of 123,918,376

TUCKING APPARATUS FOR CURTAIN OR LIKE CLOTH FIELD OF INVENTION Thisinvention relates to apparatus for forming tucks in curtains and thelike regardless of the quality of the cloth which is involved in thetucking operation.

BACKGROUND Heretofore, a number of tuck-making devices designed asattachments for sewing machines have been proposed. For example, U.S.Pat. No. 930,469 discloses a simple attachment for producing open weltseams or garments. This attachment is used only for making single typetucks. Further, U.S. Pat. No. 488,547 discloses a device which isadapted to form tucks in cloth and to guide the same to the stitchforming mechanism of a sewing machine. Use of this device enables twotucks, which are formed so as to lie in the same direction, to besimultaneously made and guided to the stitch-forming mechanism of atwo-needle sewing machine, so that two continuous seams may be formed inthe tucks. Also, U.S. Pat. No. 2,043,735 discloses a tuck-making devicewhereby graduated or fancy tucks may be made with the same facility asstraight tucks. These prior devices all require troublesome andtime-consuming hand operation.

SUMMARY OF INVENTION An object of the invention is to provide animproved apparatus for making quickly and automatically double type oftucks in a curtain cloth or the like.

Another object of the invention is to provide an apparatus for makingcontinuously and quickly a curtain with tucks having loops for fittinghanger hooks.

To achieve the above and other objects of the invention there isprovided apparatus for tucking cloth with a sewing machine. Thisapparatus comprises a base, a slider arranged on said base for slidingmovement in both the transverse and lengthwise directions with respectto the cloth to be tucked, a working plate fixedly secured to saidslider to extend horizontally therefrom and having a working positionfor guiding and supporting the cloth and a first presser pivotablyconnected to said slider and extending transversely of the cloth forlifting and lowering movement over the working plate. A second presseris provided on the base positioned on the working plate adjacent thefirst presser and parallel relation thereto. An upper spatula and alower spatula are mounted on the slider for lifting and loweringmovement over the working plate for backward and forward movementrelative to the working position of the working plate in the transversedirection of the cloth to be tucked. The lower and upper spatulas arearranged one above the other and in a position parallel to the first andsecond pressers and are movable up and down so as to be brought into andout of engagement with each other. A width setting bar is mounted on theslider for forward and backward movement relative to the workingposition of the working plate in the transverse direction. A tuckingplate is pivotably connected to the slider so as to be inserted betweenthe upper and lower spatulas when the spatulas are moved away from eachother.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a perspective view of thewhole apparatus in which the first presser, the second presser, theupper spatula and the lower spatula are position on the working plate,

FIGS. 2 through 5 and FIG. 19 are perspective views showing theoperation of the parts which perform the tucking,

FIG. 6 is a plan view showing the upper spatula arm lever and the lowerspatula arm lever,

FIG. 7 is a front view showing the relation between the first arm lever,the lower arm plate and support plate,

FIG. 8 is a side view of the same,

FIG. 9 is an end view taken through line AA in FIG. 6,

FIG. 10 is a perspective view of the mechanism for rotating therotatable shaft,

FIG. 11 is a perspective of a slide mechanism for the width setting bar,

FIG. 12 is a perspective view of the mechanism for swinging the tuckingplate,

FIG. 13 and FIG. 14 are front views showing the mechanism for actuatingthe slider,

FIG. 15 is a front view showing the relation of the slider and the base,

FIG. 16 is a side view of the same,

FIG. 17 is a view showing the sewing cam,

FIG. 18 is a circuit diagram,

FIG. 20 is a perspective view showing a cloth tucked and sewn, and

FIG. 21 is a perspective view of the mechanism for sliding the upperspatula and the lower spatula.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will next bedescribed in detail with reference to an embodiment thereof shown in theaccompanying drawings. Those parts which perform the formation of tucksinclude a first presser 1, an upper spatula 2, a lower spatula 3, awidth setting bar 4, a tucking plate 5 and asecond presser 6.

Said first presser 1. is, fixed at 16 to one end of a first arm lever 11of which the other end is pivotally affixed at 15 to a slider 7.Positioned over one end portion of said first arm lever 11 and fixed tothe slider 7 is a frame 13 carrying a pus-hing shaft which is normallybiased downward by means of a spring 10 so that a roller 14 pivotallyattached to the lower end of the shaft 12 pushes downwardly the endportion of said first arm lever to bring the above-mentioned firstpresser 1 against the upper surface of a working plate 7 connected toone end of the slider 7. (See FIGS. 1 and 2).

Referring to the upper spatula 2 and lower spatula 3, there is arotatable shaft 17 rotatably supported at its middle 18 by the slider"7and on one end of said rotatable shaft 17 is loosely fitted one end of alower spatula arm plate 19 having at its other end a slot 21 throughwhich extends a machine screw 22 for fastening the lower spatula 3 suchthat the lower spatula 3 is held parallel to said first presser 1 and incontact with the working plate 7' of the slider 7 located under the armof the sewing machine. The lateral position of the lower spatula 3 maybe adjusted by means of said slot 21. Adjacent to the lower spatula armplate 19 there is an upper spatula arm plate 23 fixed at its one end tothe rotatable shaft 17 as by 24 and having at its other end a slot 25through which extends a machine screw 26 for fastening the upper spatula2 to overlie the lower spatula 3. The lateral position of the upperspatula 3 may be adjusted by meansof said slot 25. On one end of asupport shaft 27 rotatably carried by the slider 7 at its middle is asupport plate 28 fixed at one end thereof which has a hooked portion 29at the other end engaged around the peripheral groove 19 of thecylindrical portion at the end of said lower spatula arm plate 19 sothat said support plate 28 remains normally still without turning alongwith the swinging of the lower spatula arm plate 19. A pin 30 extendsfrom the center of the support plate 28 to engage the center of a spring31 of which one end is fixed to the support plate 28 and the other endis fixed to the end of the upper spatula arm plate 23, whereby saidspring 31 is through its expanding action, normally urging said upperspatula arm plate 23 downward to position the upper spatula 2 on thelower spatula 3 (See FIG. 2).

An angled hook 33 is secured to said lower spatula arm plate 19 in aposition such that under the horizontal part 34 of said hook 33 islocated a projection 35 extending from the previously mentioned firstarm lever- 11. A spring 36 is stretched between the horizontal part 34of the hook 33 and the support plate 28 so as to urge the lower spatula3 onto the working plate 7 of the slider 7.

There is a second lever 38 pivotally supported at its center on the base8. One end of the second arm lever 38 is positioned under the first armlever 11 and a tension spring 39 is mounted between the other end of thesecond arm lever 38 and the base 8. A connecting rod 40 is providedbetween the end of the second arm lever 38 and a first solenoid (SeeFIGS. 2 and 7). An arm 41 formed on the other end of afore-mentionedrotatable shaft 17 is adapted to be pushed by a push lever 42 swingablyon a vertical shaft 53 fixed on the slider 7.

One end of said second push lever 42 is forced to engage with a secondcam 43 secured to a cam shaft 54 by means of a spring 44 extendingbetween the push lever 42 and the slider 7 (See FIGS. Z and The widthsetting bar 4 is slidably fixed at one end thereof to the slider 7 andit is held parallel to the upper spatula 2 and lower spatula 3 as wellas is positioned on the right hand side of the working plate 7 of theslider 7. A sliding shaft 45 slidably supported at its middle by theslider 7 has on one end thereof a fixing plate 46 with a hole 47 forslidably receiving a bent portion 4 of the width setting bar 4 to befastened to the fixing plate 46 by means of a set screw 48.

To the other end of said sliding shaft 45 is secured a connecting plate49 pivotally connected at 51 to one end of a link 50, whose other end ispivotally connected at 55 to one end of a first push lever 52 swingablymounted on said vertical shaft 53. The other end of said lever 52 isforced against a first cam 56 secured to said cam shaft 54 by means of aspring 57 stretched between the lever and the slider 7. The lateralposition of the width setting bar 4 may be adjusted by shifting the bentportion 4 along the hole 47 of the fixing plate 46 (See FIG. 1 1).

The tucking plate 5 is swingably supported atthe center by the slider 7and its one end is normally positioned outwardly of the width settingbar so that the tucking plate may come in between the upper and lowerspatulas 2 and 3 when they are open apart, and the other end isconnected pivotally to one'end of a link 61 whose other end is pivotedat 64 to one end of a third push lever 63 swingably mounted on saidvertical anism for the slider comprises a cam 66 of the sewing machine(LK cycle sewing machine), and a swingable arm 67 engaging said cam 66at one end as at 68 and connected pivotally as at 69 at the other end tothe slider 7 by means of a link 67. The cross slide mechanism for theslider comprises a motor 76 set on the base 8, a gear 78 fixed on theshaft of the motor, a disc 79 attached to the side of the gear 78, agear 80 engaging the gear 78 and having a pin 81, a limit switch 82 sopositioned as to be tripped by said pin 81, and a rod 84 pivotallyconnected at 85 with an eccentric pin 83 projecting from said disc 79and at 86 with the support shaft 75 (See FIGS. 13 and 14).

The second presser comprises the presser foot of said LK cycle sewingmachine and is located between the first presser 1 and the upper andlower spatulas 2 and 3 (See FIG. 1).

On the other end of the support shaft 27 is fixed a connecting pate 88to which is pivotally connected one end of a link 89 whose other'end ispivotally connected at 92 to one end of a forth push lever 91 swingablymounted on the vertical shaft 53. The push lever 91 is urged to engageat the other end a cam 93 fixed on the cam shaft 54 by means of a spring94 stretched between said lever 91 and the slider 7 (See FIG. 21).

The operation of the apparatus will now be described. Upon turning onthe switch for a first solenoid, a second solenoid and the sewingmachine driving motor, the first solenoid will be energized and pull theconnecting rod 40 downward by its attractive force. The second arm lever38 will then swing on the pivot 37 and cause, with one end thereof, thefirst arm lever 11 to swing upward about the pivot 15 against the actionof the spring 13. As a result, the first presser 1 will be elevated.When the first arm lever 11 swings upward as stated above, itsprojection 35 pushes the angled hook 33 upward against the tension ofthe spring 36 to cause the lower spatula arm plate 19 to rotate therotatable shaft 17 (as shown by the arrow). The lower apatula 3 willthen move upward and at the same time lift the upper spatula 2 againstthe action of the spring 31, followed by the upward swing of the upperspatula arm lever 23 whereby the rotatable shaft 17 will be rotated andstop.

The second solenoid is energized simultaneously with the energization ofthe first solenoid thereby to elevate the second presser 6 which isconstituted by the presser foot of the sewing machine (in a manner wellknown).

As a result, the first presser l, the upper spatula 2, the lower spatula3 and the second presser '6 come and stop at elevated positions over theworking plate 7 of the slider 7. At that time, the sewing machinedriving motor is of course rotating.

Then, as shown in FIG. 2, the cloth 70 is placed with one end portionthereof arranged over the upper spatula 2 and the width setting bar 4while applying one longitudinal edge thereof to a ruler fixed to theslider 7. Thereafter, it is folded backward around the width setting barand passed under the lower apatula 3 so that its leading end underliesthe remaining portion of the cloth in a position under the firstpresser 1. The cloth 70 is stretched from the width setting bar 4. It isneedless to say that the lengthwise edge of the cloth 70 should bealways held along the ruler 71 during that process.

Then a first button is pressed to disenergizes said first solenoid.Thereupon the first solenoid will reverse and the second arm lever 38will swing back due to the action of the spring to lower its left-handend, so that the first arm lever 11 which has been lifted up by the endof the second arm lever 38 will be let down swinging about the pivot 15.Accordingly the first presser 1 will come down to hold the cloth 70 onthe working plate 7' of the slider 7. When the first arm lever 11 comesdown as mentioned above, the angled hook 33 of the lower spatula armlever 19 will not be pushed upward by the projection 35 of the first armlever 11 any longer and therefore the lower spatula arm lever 19 willswing downward under the tension of the 'spring 36 about the rotatableshaft 17 so as to bring the lower spatula 3 into contact with theunderlying portion of the cloth 70. The above-mentioned downwardmovement of said lower spatula arm lever 19 causes the upper spatula armlever 23 also to move downward under the action of the spring 31 so thatthe upper spatula will overlie the lower spatula 3. Of course, therotatable shaft 17 rotates at that time (as shown by the arrow in FIG.3).

Next a starting switch (not shown) is turned on, whereupon the secondsolenoid will be deenergized. The second solenoid will then reverse tolower the second presser 6, which has been elevated, to hold the cloth70 on the working plate 7' of the slider 7. When the secnd solenoid isdeenergized as stated above, a third solenoid is energized to make aclutch of the sewing machine on whereby the sewing machine starts itsoperation as it now receives power from said sewing machine drivingmotor and rotates the cam shaft. The cam 66 rotates and this rotation isconverted into the traverse movement of the operating arm 67 whichcauses the slider 7 to traverse as the sewing needle 72 is sewing. Theproceeding of such operation is represented in the development chart ofthe cam shown in FIG. 17. Since the sewing machine is an LK cyclemachine 8 in which one cycle comprises two runs of sewing, it stopsbecause of the disconnection of a clutch after the first run of sewinghas been completed. This stopping of the sewing machine is sensed by alimit switch which will operate a relay to energize the'second solenoid.Thereupon the second presser 6 is raised and stops, and this stop iselectrically sensed to operate a relay (for this purpose refer to thecircuit shown in FIG. 18) to drive motor 75, whose rotation istransmitted to the gear 78 to rotate it in the direction of the arrow inFIG. 13, causing rotation of the arm lever 84 to shift the slider 7 tothe left (See FIG. Each revolution of the gear 80 makes its pin 81strike the limit switch 82 to stop the motor 76, so that the slider 7will stop at the leftmost position (See FIG. 14).

When the second presser 6 has completed its rising, it is sensedelectically and this information is transferred to a relay to excite themotor 73 which will rotate the cam shaft 54 so that the first cam 56will cause the width setting bar 4 to be retracted through the firstpush lever 52, the arm 50, the connecting plate 49, the

sliding shaft 45 and the connecting plate 46, while on the other handthe second cam 43 causes the second push lever 42 to push the arm 41 torotate the rotatable shaft 17 so that the upper spatula 2 will be liftedup to some distance from the lower spatula 3 and therefore the cloth 70will be opened (See FIG. 19). At the same time the third cam 65 causesthe tucking plate 5 to be swung about the pivot through the action ofthe third push lever 63 and the link 61 so that the tucking plate willbe brought between the upper spatula 2 and the lower spatula 3. In themean time, the second cam 43 causes the arm 41 and the shaft 17 toreverse to let the upper spatula 2 down. Accordingly a tuck is formed onthe cloth 70 by means of the first presser 1, the upper spatula 2 thelower spatula 3 and the tucking plate 5 (See FIG. 4).

After this, the third cam reverses the third push lever and the link 61to draw out the tucking plate from between the upper spatula 2 and thelower spatula 3. Thereafter the forth cam 93 causes the upper and thelower spatulas 2 and 3 to be retracted through the action of the forthpush lever 91, the link 89, the connector plate 88 and the support plate28 (See FIG. 5). Thereupon a projection 95 formed on the cam shaftstrikes the limit switch 96 to stop the motor 73. The signal from thelimit switch 96 will excite a relay to deenergize the second solenoidand therefore the second presser 6 will come down. Then, as previouslystated, the third solenoid is energized to make the clutch of the sewingmachine make the slider 7 traverse as'sewing is performed. Thus, thesecond run of sewing with the LK cycle sewing machine comes to an end.Then the first solenoid and the second solenoid become deenergized andthe first presser 1 and the second presser 6 are lifted.

The clutch is then disconnected. This disconnection of the clutch issensed by a limit switch to excite a relay to start the motor 73 and themotor 76 to rotate the cam shaft 54, causing upper and lower spatulas 2and the width setting bar to proceed forward to return to their initialpositions. The operation of the motor 76 also causes the returning ofthe slider 7 rightward to its initial position. The cloth may now betaken out. A tuck has thus been formed in the cloth as shown in FIG.

What is claimed is:

1. An apparatus for tucking cloth with a sewing machine, said apparatuscomprising a base, a slider arranged on said base for sliding movementin both the transverse and lengthwise directions with respect to thecloth to be tucked, a working plate fixedly secured to said slider toextend horizontally therefrom and having a working position for guidingand supporting the cloth, a first presser pivotably connected to saidslider and extending transversely of the cloth for lifting and loweringmovement over the working plate, a second presser on the base positionedon the working plate adjacent said first presser in parallel relationthereto, an upper spatula and a lower spatula mounted on the slider forlifting and lowering movement over the working plate and for backwardand forward movement relative to the working position of the workingplate in the transverse direction of the cloth to be tucked, said upperand lower spatulas being arranged one above the other in a positionparallel to said first and second pressers and being movable up and downso as to be brought into and out of engagement with each other, a widthsetting bar mounted on the slider for backward and forward movementrelative to the working position of the working plate in the transversedirection, and a tucking plate pivotably connected to the slider so asto be inserted between the upper and lower spatulas when the spatulasare moved away from each other.

2. An apparatus as set forth in claim 1 comprising a first lever, aspring, upper and lower arm plates and further springs, first presserbeing pivotably connected to said slider through said first lever andbeing normally pressed against the working plate by means of the firstsaid spring, said upper and lower spatulas being pivotably connected tothe slider'through said upper and lower arm plates, said arm platesbeing juxtaposed with respect to each other and being I normally pressedagainst the working plate by means of said further springs, said upperand lower spatula arm plates being constituted so as to be lifted andlowered in connection with the lifting and lowering movement of saidfirst lever.

3. An apparatus as set forth in claim 2 comprising a solenoid and asecond lever pivotably connected to the base substantially at rightangles to said first lever, said second lever being positioned at oneend below the first lever and connected at the other end to saidsolenoid, whereby the first presser can be moved upwardly anddownwardly.

4. An apparatus as set forth in claim 1 comprising a rotatable shaft,said lower spatula arm plate being loosely mounted on said rotatableshaft which is pivotably connected to the slider, said upper spatula armplate being fixedly mounted on said rotatable shaft, whereby said upperand lower spatulas can be moved into and out of engagement with eachother.

5. An apparatus as set forth in claim 4 comprising a support platearranged between said upper and lower spatula arm plates in a positionparallel thereto, said support plate being engaged at its one end with aboss of the lower spatula arm plate on said rotatable shaft extendingslidably from the slider in the transverse direction of the cloth to betucked and being fixedly mounted at the other end on a support shaftextending slidably from the slider in parallel relation to saidrotatable shaft, and said support plate being connected to the upper andlower spatula arm plates through said springs, whereby the upper andlower spatulas can be moved backward and forward relative to the workingposition of the working plate by moving the support shaft.

6. An apparatus as set forth in claim 5, characterized in that saidslider includes a plurality of cam means including a first cam means foroperating the width setting bar, a second cam means for operating thewidth setting bar, a second cam means for operating the rotatable shaft,a third cam means for operating the tucking plate and a fourth cam meansfor moving said upper and lower spatulas backward and forward relativeto the working position of the working plate.

1. An apparatus for tucking cloth with a sewing machine, said apparatuscomprising a base, a slider arranged on said base for sliding movementin both the transverse and lengthwise directions with respect to thecloth to be tucked, a working plate fixedly secured to said slider toextend horizontally therefrom and having a working position for guidingand supporting the cloth, a first presser pivotably connected to saidslider and extending transversely of the cloth for lifting and loweringmovement over the working plate, a second presser on the base positionedon the working plate adjacent said first presser in parallel relationthereto, an upper spatula and a lower spatula mounted on the slider forlifting and lowering movement over the working plate and for backwardand forward movement relative to the working position of the workingplate in the transverse direction of the cloth to be tucked, said upperand lower spatulas being arranged one above the other in a positionparallel to said first and second pressers and being movable up and downso as to be brought into and out of engagement with each other, a widthsetting bar mounted on the slider for backward and forward movementrelative to the working position of the working plate in the transversedirection, and a tucking plate pivotably connected to the slider so asto be inserted between the upper and lower spatulas when the spatulasare moved away from each other.
 2. An apparatus as set forth in claim 1comprising a first lever, a spring, upper and lower arm plates andfurther springs, first presser being pivotably connected to said sliderthrough said first lever and being normally pressed against the workingplate by means of the first said spring, said upper and lower spatulasbeing pivotably connected to the slider through said upper and lower armplates, said arm plates being juxtaposed with respect to each other andbeing normally pressed against the working plate by means of saidfurther springs, said upper and lower spatula arm plates beingconstituted so as to be lifted and lowered in connection with thelifting and lowering movement of said first lever.
 3. An apparatus asset forth in claim 2 comprising a solenoid and a second lever pivotablyconnected to the base substantially at right angles to said first lever,said second lever being positioned at one end below the first lever andconnected at the other end to said solenoid, whereby the first pressercan be moved upwardly and downwardly.
 4. An apparatus as set forth inclaim 1 comprising a rotatable shaft, said lower spatula arm plate beingloosely mounted on said rotatable shaft which is pivotably connected tothe slider, said upper spatula arm plate being fixedly mounted on saidrotatable shaft, whereby said upper and lower spatulas can be moved intoand out of engagement with each other.
 5. An apparatus as set forth inclaim 4 comprising a support plate arranged between said upper and lowerspatula arm plates in a position parallel thereto, said support platebeing engaged at its one end with a boss of the lower spatula arm plateon said rotatable shaft extending slidably from the slider in thetransverse direction of the cloth to be tucked and being fixedly mountedat the other end on a supporT shaft extending slidably from the sliderin parallel relation to said rotatable shaft, and said support platebeing connected to the upper and lower spatula arm plates through saidsprings, whereby the upper and lower spatulas can be moved backward andforward relative to the working position of the working plate by movingthe support shaft.
 6. An apparatus as set forth in claim 5,characterized in that said slider includes a plurality of cam meansincluding a first cam means for operating the width setting bar, asecond cam means for operating the width setting bar, a second cam meansfor operating the rotatable shaft, a third cam means for operating thetucking plate and a fourth cam means for moving said upper and lowerspatulas backward and forward relative to the working position of theworking plate.